rishabhdaim commented on code in PR #2621:
URL: https://github.com/apache/jackrabbit-oak/pull/2621#discussion_r2556070242


##########
oak-blob-cloud/src/main/java/org/apache/jackrabbit/oak/blob/cloud/s3/S3Backend.java:
##########
@@ -513,12 +513,26 @@ public void addMetadataRecord(final InputStream input, 
final String name) throws
         final ExecutorService executor = Executors.newSingleThreadExecutor();
         try {
             
Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
+            final PutObjectRequest.Builder putObjectRequestBuilder = 
PutObjectRequest.builder()
+                    .bucket(bucket)
+                    .contentType("application/octet-stream")
+                    .key(addMetaKeyPrefix(name));
+
             // Specify `null` for the content length when you don't know the 
content length.
-            final AsyncRequestBody body = 
AsyncRequestBody.fromInputStream(input, null, executor);
+            final AsyncRequestBody body;
+            if (Objects.equals(RemoteStorageMode.S3, 
properties.get(S3Constants.MODE))) {
+                body = AsyncRequestBody.fromInputStream(input, null, executor);
+            } else {
+                // for GCP we need to know the length in advance, else it 
won't work.
+                byte[] bytes = input.readAllBytes();

Review Comment:
   @joerghoh Yes, it might cause OOM, but there is no other option. 
   GCP doesn't work with unknown-length streams, so we had to find the length.
   
   FYI: I have tested with 200+MB files and they are working fine.



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